<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>找到event</title>
		<script type="text/javascript">
//			function whichButton(){
//				console.log(arguments[0]);  
//			}
			function whichButton(e){
				var e = e || window.event;
				console.log(e);	  
			}
		</script>
	</head>
	<body>
		<p onmousedown="whichButton(event)">请在文档中点击鼠标。触发点击函数。</p>
	</body>
</html>